Add 72/98 and 75/80
72/98 + 75/80 is 1311/784.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 98 and 80 is 3920
Next, find the equivalent fraction of both fractional numbers with denominator 3920 - For the 1st fraction, since 98 × 40 = 3920,
72/98 = 72 × 40/98 × 40 = 2880/3920 - Likewise, for the 2nd fraction, since 80 × 49 = 3920,
75/80 = 75 × 49/80 × 49 = 3675/3920 - Add the two like fractions:
2880/3920 + 3675/3920 = 2880 + 3675/3920 = 6555/3920 - 6555/3920 simplified gives 1311/784
- So, 72/98 + 75/80 = 1311/784
In mixed form: 1527/784
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: